Valve-grinder



L MERRITT.

VALVE GRINDER. APPLICATION FILED NOV. 1. I919.

Patented Apr. 6, 1920 m. 0 M v a m. D o m W\ l Th 2 5 m -dri vr s.

LABE MERBITT, OF CREEDMORE, NORTH CAROLINA.

VALVE-GRINDER.

Specification of Letters Patent.

Application filed November 1, 1919. Serial No. 334,908.

1 '0 all whom it may concern lie it known that l, Lana MnRm'rr, a citizen of the United States, residing at Creedmore. in the county of Granville and State of North (arolinm have invented certain new and useful Improvements in Valv (ii'indcrs. of which the following is a spooliication.

The invention provides a tool whereby all the valves of an internal combustion cnglue may in? ground at one operation and in about the same time as ordinarily required to grind a single valve.

' 'lhc :liii-.i'iiig.-i illustrate a preferred en hodinzent oi the invention; However, it is to he understood that in adapting the same to meet different conditions, various changes in the form. proportion and minor details of construction may be resorted to without departing from the nature of the invention as claimed hereinafter.

Referring to the drawings hereto attached,

Figure 1 is a front view of a valve grinder embodying the invention.

Fig. is a transverse section on the line 2-2 of l ig. l. looking in the direction of the arrows.

Fig. is a top plan view of an end portion of the tool.

(oi-responding and like parts are referred i in tlufollowing description and indicated in the several figures of the drawings by like reference characters.

The tool, comprises a suitable frame which as shown embodies a standard 1 and a longitudinal bar The standard 1 is located intermediate the ends of the bar 2 and perpendicular thereto. The bar 2 is of L-foriu in cross section. One of the wings or iia ages of the ba r 2 is provided with a plurality cl openings which receive the valve 'l'hese valve drivers are adapted to be oscillated by means of an operating bar 3 which is connected by means of a link 4- to an arm I at the lower end of a vertical shaft 6 journaled in the standard 1. A bevel pinion 7 secured to the upper. end of the shaft 6 is in mesh with a beveled gear 8 mounted on the standard and provided with an operating handle 9. lhe lower end of the standard 1 is provided with a foot 10 by means of which it is adapted to be attached to the engine or other suitable support.

Each valve driver comprises a shaft 11, an arm 12, a wrist pin 13 and an expansible helical spring 14-. T he shaft 11 is mounted gitudinal-bar 2 in such a manner as bothf to turn and to move longitudinally. The spring 14 is mounted on the shaft 11 and ex:

erts a downward pressure thereon and admits of the valve driver yielding vertically so'as to adapt itself to the valve with which it is in cooperative relation when the tool'is in working position. The wrist pin 13 is disposed at the outer end of the arm 12 and extends in the same direction as the shaft 11. and parallel therewith and passes through an opening in the operating bar 3. By having the pin .1?) loosely engaging the operating bar 5-3, anyone of the valve drivers may be thrown out of action. A bit or valve engaging element. 15 is pivotally connected to the lower end of each of the shafts 11 in a manner well understood so as to maintain positive engagement with the valve and prevent casual disengagement of the driver from the valve when the tool is in active operation.

The tool is essentially a shop appliance and facilitates the work of grinding puppet valves of internal combustion engines at one operation and in substantially the same time as usually required for grinding the single valve. T he tool will embody as many valve drivers as there are valves to be ground and the valve drivers are so positioned as to correspond with the positions of the valves. Obviously the tool must be specifically constructed to fit the type of en ine for which it is designed and when grim ing the valves the bit or valve engaging element 15 of each driver is engaged with a valve and upon 0pcrating the drive gear 8 the shaft 6 is rotated and a reciprocating movementis im parted to thcoperating bar 3. By reason of the connection of the drivers with the operating bar 3, said drivers have an oscillatory movement imparted thereto. The operating bar 3 is connected at its ends by means of links 16 to the longitudinal bar 2, said links having pivotal connection with the two bars.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent, is:

1. In a valve grinder, a frame, a valve driver mounted in the frame to receive both a rotary and a longitudinal movement, an operatin member, and a pin slidably and detaehab y connecting the valve driver with the operating member.

2. A valve grinder comprising a frame, a

Patented Apr. 6, 1920.

lurality of valve drivers mounted in the rame, each adapted to receive both a rotary and a longitudinal movement, an operatin member common to all the valve drivers, an pins detachably connecting the valve drivers with the operating member to admit of any one of the valve drivers being thrown out of action or adapting itself to the work.

3. A valve grinder comprising a "frame, a plurality of valve drivers mounted in the frame to receive both a rotary and a longitudinal movement, a sprin cooperating with each valve driver to yieldably hold it in a given position, an operating member common to all the valve drivers and pins slidably and detachably connecting the valve drivers with the operating member.

4. A valve grinder comprising a longitudinally disposed bar, a standard having connection with the bar, a plurality of valve drivers rotatably, and slidably mounted on the bar, an operating bar, pins carried by the valve drivers and having slidable and detachablc connection with the operating bar, actuating mechanism carried by the standard and connecting means between actuating mechanism and the operatin bar.

5. A valve grinder comprising a longitudinally disposed bar, a standard intermediate the len th of the bar, a plurality of shafts rotatzllily and slidably mounted in said bar, arms projecting from the shaft, valve engaging elements pivotally connected with the lower ends of the shaft, springs 00- o 'ierating with the shafts to yieldably hold them in a given position, an operating bar, pins slidably and detachably connecting the arms of the shafts with the said operating bar, links pivotally connecting the operating bar with the longitudinal bar, actuating mechanism mounted upon the standard and connecting means between the actuating mechanism and the operating bar to impart a reciprocating movement to the latter.

In testimony whereof I alllx my signature in the presence oi two Witnesses.

LABE MERRITT.

Witnesses I. E. HAmus, KATIE M. LONGMIRE. 

